HCD.10:1 - Problem Frame

A learner can succeed repeatedly while the task, timing, sources, help, and answer structure remain unchanged. The success may be useful, but it does not show how the person will act when a configuration changes, a similar Method competes, a familiar cue disappears, or the work returns after an interval.

The usual response is to bundle several fashionable difficulties: delay the next task, remove sources, mix topics, withdraw guidance, and increase complexity. When the learner fails, the practitioner cannot tell which change mattered. The difficulty may be inaccessible data or excessive load rather than a useful challenge.

A usable progression selects changes from the target action and existing evidence, preserves their separate meanings, and gives each one a response rule. It can keep practice stable when variability would currently obscure rather than develop the action.